Radio communication system, relay station device, terminal station device, and wireless communication method

Abstract

An aspect of the present invention includes a mobile collection station device, one or more relay station devices, and one or more terminal station devices, the mobile collection station device is configured to transmit a terminal startup signal for starting up the terminal station device at a second frequency different from a first frequency which is a transmission frequency of the terminal station device, the relay station device is configured to transmit a predetermined signal at the first frequency when the terminal startup signal from the mobile collection station device is received, and the terminal station device is configured to start up the terminal station device and then to transmit a desired data signal to the mobile collection station device when the predetermined signal from the relay station device is received.

1 . A wireless communication system comprising:
 a mobile collection station device;   one or more relay station devices; and   one or more terminal station devices,   wherein the mobile collection station device is configured to transmit a terminal startup signal for starting up the terminal station device at a second frequency different from a first frequency which is a transmission frequency of the terminal station device,   the relay station device is configured to transmit a predetermined signal at the first frequency when the terminal startup signal from the mobile collection station device is received, and   the terminal station device is configured to start up the terminal station device and then to transmit a desired data signal to the mobile collection station device when the predetermined signal from the relay station device is received.   
     
     
         2 . The communication system according to  claim 1 , wherein
 the relay station device comprises a first relay station device and a second relay station device,   the terminal station device comprises a first terminal station device and a second terminal station device,   the first relay station device transmits the predetermined signal to the first terminal station device using a signal of a modulation scheme with a low required carrier to noise ratio (C/N), and notifies the nearby second relay station device of a transmission timing, and   the first relay station device and the second relay station device control a timing at which the first terminal station device and the second terminal station device transmit the desired data signal by shifting a transmission timing of the terminal startup signal which is transmitted to the second terminal station device by the second relay station device.   
     
     
         3 . The communication system according to  claim 1 , wherein the relay station device uses a cyclic code sequence for the predetermined signal to perform control so that the terminal station device is able to start up even in a case where a start timing at which the predetermined signal is detected is shifted. 
     
     
         4 . The communication system according to  claim 3 , wherein the terminal station device detects the number of error bits for the received predetermined signal, and starts up the terminal station device when the number of error bits is equal to or less than a predetermined number. 
     
     
         5 . The wireless communication system according to  claim 1 , wherein in a case where interference is detected in the predetermined signal, the relay station device changes a transmission pattern for the predetermined signal and controls the terminal station device serving as a reception side to obtain the same result. 
     
     
         6 . A relay station device comprising a relay processing unit configured to transmit a predetermined signal to a terminal station device at a first frequency which is a transmission frequency of the terminal station device when a terminal startup signal for making a request for startup of the terminal station device and a request for a mobile collection station device to transmit a desired data signal is received from the mobile collection station device,
 wherein a frequency of the terminal startup signal is a second frequency different from the first frequency.   
     
     
         7 . A terminal station device comprising a terminal processing unit configured to transmit a desired data signal to a mobile collection station device after starting up the terminal station device when a predetermined signal of a first frequency for starting up the terminal station device based on a terminal startup signal received from the mobile collection station device is received from a relay station device,
 wherein a frequency of the terminal startup signal is a second frequency different from the first frequency which is a transmission frequency of the terminal station device.   
     
     
         8 . A wireless communication method in a wireless communication system comprising a mobile collection station device, one or more relay station devices, and one or more terminal station devices, the method comprising:
 causing the mobile collection station device to transmit a terminal startup signal for starting up the terminal station device at a second frequency different from a first frequency which is a transmission frequency of the terminal station device;   causing the relay station device to transmit a predetermined signal at the first frequency when the terminal startup signal from the mobile collection station device is received; and   causing the terminal station device to start up the terminal station device and then to transmit a desired data signal to the mobile collection station device when the predetermined signal from the relay station device is received.